68 THE FATS. 



are effected. Like the substances that have already been con- 

 sidered, these products will be taken up only in a general way at 

 first; while their special study, as well as their methods of isolation 

 and quantitative estimation, will bo considered in succeeding chapters, 

 in connection with the chemical study of those tissues in which they 

 arc principally encountered. At this place I wish only to impress 

 general facts upon the mind of the student, so that he will be pre- 

 pared to understand the composite chemical structure of the various 

 tissues and organs of the body, as will be described later. 



